Unit 2: Food and Nutrition
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Transcript of Unit 2: Food and Nutrition
Unit 2: Food and Nutrition
Learning objectives:• Understand the nutritional needs.• Recognise the main nutrients and their function in the human body.• Analyse and compare different types of diet.• Recognise healthy eating habits.• Identify the main disorders caused by inadequate nutrition.
1. Food and nutrientsNutrients
Organic nutrients
Carbohydrates
Simple carbohydrate
s or sugars
Complex
carbohydrates
Lipids
Fats
Saturated Unsaturated
Membrane lipids
Lipids with regulatory functions
Proteins Vitamins
Fat soluble (A, D, E, K)
Water soluble
Inorganic
nutrients
Mineral salts Water
(sacarosa)
Function: to provide energy in the short term
Starch (almidón)
Function: to provide energy in the long term
Function: to provide energy
Unsaturated fatsFunction: to provide energy
Function of proteins•to form structures• to transport oxygen (haemoglobin)• to regulate biological responses• to form antibodies (body defence)
Vitamins
Fat soluble
A D E K
Water soluble
Bs C
Mineral saltsThey have different functions.We need large amounts of Mg, K, Ca, NaWe need minimal amounts of Fe, Zn, Cu and I.
Water
It allows us to carry out our own metabolic reactions. It regulates body temperature. It serves as a medium for transporting subtances.
Water is the universal solvent:
2. Nutritional Needs
Nutritional NeedsStructural•Proteins
Providing energy•Lipids•Carbohydrates
Regulatory•Vitamins•Mineral Salts
Mediterranean dietIt is based on:-Olive oil-Cereals-Pulses-Fish-Vegetables and fruits
4. Food consumptionFood additives
They are natural or artificial substances that are added to foods for various purposes:
• preservatives (conservantes)• colourings• flavour enhancers (potenciadores del sabor)• stabilisers• antioxidants• sweeteners (edulcorantes)
Difference between best-before and use-by dateBest-before (“consumir preferentemente antes de”): This ensures that
the food retains all its nutritional features.
Use-by date (“fecha de caducidad”): After this date, consumption of the food may be harmful.
1. Look at your food label and write down on your notebookwhat pieces of information are included.
Name of product: Cheetos crunchyProduct amount: 280 gList of ingredientsInstructions for use or cookingNutrition FactsSpecial storage conditions…2. Find out about the additives. Write them down and indicatewhat type of additive they are.
Artificial flavour flavour enhancerMonosodium glutamate flavour enhancerCitric acid preservative…
3. Check if your product has a best-before or a use-by date. If you do not find it, guess it.
use-by date
ON YOUR NOTEBOOK
IN PAIRS- BOOK page 35